CO₂ capture, especially under low-pressure range, is of significance to maintain long-duration human operation in confined spaces and decrease the CO₂ corrosion and freezing effect for the liquefaction of natural gas. Herein, we for the first time report a novel anion-functionalized ZU-16-Co (TIFSIX-3-Co, TIFSIX=hexafluorotitanate (TiF₆²⁻), 3=pyrazine), which exhibits one-dimensional pore channels decorated by abundant F atoms, for efficient CO₂ capture at a concentration around 400–10,000 ppm. Among its isostructural MFSIX-3 (M=Si, Ti, Ge) family materials, ZU-16-Co with fine-tuned pore size of 3.62 Å exhibits the highest CO₂ uptake at 0.01 bar (10,000 ppm) and 1 bar (2.63 and 2.87 mmol g⁻, respectively). The high CO₂ capture ability of ZU-16-Co originates from the fine-tuned pore dimensions with strong F⋯C=O host-guest interactions and relatively large pore volumes coming from its longer coordinated Ti-F-Co distance (3.9 Å) in c direction. The excellent carbon trapping performance was further verified by dynamic breakthrough tests for CO₂/N₂ (1/99 and 15/85) and CO₂/CH₄ (50/50) mixtures. The adsorption and separation performances, resulting from the fine-tuned pore system with periodic arrays of exposed functionalities, demonstrate that ultramicroporous ZU-16-Co can be a promising adsorbent for low-concentration carbon capture.

捕获CO ₂，特别是在低压范围内，对于保持人类在密闭空间中的长时间运行以及降低CO ₂对天然气液化的腐蚀和冻结作用具有重要意义。在此，我们首次报道了一种新型的阴离子官能化的ZU-16-Co（TIFSIX-3-Co，TIFSIX =六氟钛酸酯（TiF ₆ ^2-，3 =吡嗪）），其一维孔道被丰富的装饰F原子，用于以大约400–10,000 ppm的浓度有效捕获CO ₂。在其同构MFSIX-3（M = Si，Ti，Ge）系列材料中，孔径微调为3.62Å的ZU-16-Co在0.01 bar（10,000 ppm）和1 bar（2.63）时表现出最高的CO ₂吸收率。和2.87 mmol g^-分别）。ZU-16-Co的高CO ₂捕集能力来自具有F⋯C = O主体-客体相互作用的微调孔尺寸，以及更长的Ti-F-Co配位距离（3.9Å），具有相对较大的孔体积）沿c方向。通过对CO ₂ / N ₂（1/99和15/85）和CO ₂ / CH ₄（50/50）混合物进行动态穿透测试，进一步证实了优异的碳捕获性能。具有周期性排列的暴露官能团的微调孔隙系统产生的吸附和分离性能表明，超微孔ZU-16-Co可能是低浓度碳捕获的有前途的吸附剂。